>>> On 03.08.15 at 13:29, <ian.campb...@citrix.com> wrote: > From: David Vrabel <david.vra...@citrix.com> > > Instead of cpu_relax() while spinning and observing the ticket head, > introduce arch_lock_relax() which executes a WFE instruction. After > the ticket head is changed call arch_lock_signal() to execute an SEV > instruction (with the required DSB first) to wake any spinners. > > This should improve power consumption when locks are contented and > spinning.
So why not use MONITOR/MWAIT on x86 for the same purpose? Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
